functions print_blue, print_yellow, print_green and print_red becomes global to be used in luadocs
Merge branch 'master' of https://github.com/pedro-andrade-inpe/terrame

# By Pedro Andrade
# Via Pedro Andrade
* 'master' of https://github.com/pedro-andrade-inpe/terrame:
  InternetSender added. A bug needs to be removed. #107.
  Small indentation issues.
  In the tests, now it verifies if the package was successfully loaded.
  Added drivers for CellularSpace. Close #49.
  New verifications in CellularSpace:createNeighborhood
  Reducing outputs in the tests when skipping files.
  mandatoryTableArgument added.
  TerraME now verifies during the tests if the package prints some message when loaded.
  Useless code removed.